﻿using System;
using System.Collections.Generic;
using System.Drawing.Imaging;
using System.Drawing;
using ZXing.Common;
using ZXing.QrCode.Internal;
using ZXing.QrCode;
using ZXing;

namespace WebAPI.Utils;

public class QrCodeHelper
{
    // // 生成二维码
    // public static Bitmap GetQRCode(string text, int width, int height)
    // {
    //     BarcodeWriter writer = new BarcodeWriter();
    //     writer.Format = BarcodeFormat.QR_CODE;
    //     QrCodeEncodingOptions options = new QrCodeEncodingOptions()
    //     {
    //         DisableECI = true,//设置内容编码
    //         CharacterSet = "UTF-8",
    //         Width = width,//设置二维码的宽度和高度
    //         Height = height,
    //         Margin = 1//设置二维码的边距,单位不是固定像素
    //     };
    //
    //     writer.Options = options;
    //     Bitmap map = writer.Write(text);
    //     return map;
    // }
    //
    // /// 生成一维条形码
    // public static Bitmap GetBarCode(string text, int width, int height)
    // {
    //     BarcodeWriter writer = new BarcodeWriter();
    //     //使用ITF 格式，不能被现在常用的支付宝、微信扫出来
    //     //如果想生成可识别的可以使用 CODE_128 格式
    //     //writer.Format = BarcodeFormat.ITF;
    //     writer.Format = BarcodeFormat.CODE_39;
    //     EncodingOptions options = new EncodingOptions()
    //     {
    //         Width = width,
    //         Height = height,
    //         Margin = 2
    //     };
    //     writer.Options = options;
    //     Bitmap map = writer.Write(text);
    //     return map;
    // }
    //
    // /// 生成带Logo的二维码
    // public static Bitmap GetQRCodeWithLogo(string text, string logoPath, int width, int height)
    // {
    //     //Logo 图片
    //     //string logoPath = System.AppDomain.CurrentDomain.BaseDirectory + @"zp.bmp";
    //     Bitmap logo = new Bitmap(logoPath);
    //     //构造二维码写码器
    //     MultiFormatWriter writer = new MultiFormatWriter();
    //     Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();
    //     hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
    //     hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
    //     //hint.Add(EncodeHintType.MARGIN, 2);//旧版本不起作用，需要手动去除白边
    //
    //     //生成二维码
    //     BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, width + 80, height + 80, hint);
    //     bm = deleteWhite(bm);
    //     BarcodeWriter barcodeWriter = new BarcodeWriter();
    //     Bitmap map = barcodeWriter.Write(bm);
    //
    //     //获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）
    //     int[] rectangle = bm.getEnclosingRectangle();
    //
    //     //计算插入图片的大小和位置
    //     int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);
    //     int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);
    //     int middleL = (map.Width - middleW) / 2;
    //     int middleT = (map.Height - middleH) / 2;
    //
    //     Bitmap bmpimg = new Bitmap(map.Width, map.Height, PixelFormat.Format32bppArgb);
    //     using (Graphics g = Graphics.FromImage(bmpimg))
    //     {
    //         g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
    //         g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
    //         g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
    //         g.DrawImage(map, 0, 0, width, height);
    //         //白底将二维码插入图片
    //         g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
    //         g.DrawImage(logo, middleL, middleT, middleW, middleH);
    //     }
    //     return bmpimg;
    // }

    /// 删除默认对应的空白
    private static BitMatrix deleteWhite(BitMatrix matrix)
    {
        int[] rec = matrix.getEnclosingRectangle();
        int resWidth = rec[2] + 1;
        int resHeight = rec[3] + 1;

        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
        resMatrix.clear();
        for (int i = 0; i < resWidth; i++)
        {
            for (int j = 0; j < resHeight; j++)
            {
                if (matrix[i + rec[0], j + rec[1]])
                    resMatrix[i, j] = true;
            }
        }
        return resMatrix;
    }
}